It isnt 24 hours straight, thats ridiculous. It is just for solving a combined total of 24 hours worth of puzzles. This can be 5 minutes on puzzles every day for the course of a year, doesn't matter.
24 Hours Puzzle solve achievement award!!!

just why would you do it
The 24 hours is the total time you've spent solving puzzles. It does not have to occur all in one day.

Not long ago, I got the award and posted about it. As the post above me says, it's for spending a total of 24 hours solving puzzles. Of course, that is not all in the same day! When I looked at my puzzle-solving time, I think it included time spent on Daily Puzzles.

PS: What you CAN do in one day, if you're feeling crazy, is do 💯 puzzles in the same day. I've got that one, too.

I think that the puzzels 24 hours achivement is for 24 hours of doing puzzles not 24 hours of puzzles straight

just why would you do it
The 24 hours is the total time you've spent solving puzzles. It does not have to occur all in one day.
now I understand
While visiting some member's profile (I didn't note that), I found that the member got some achievement award for solving puzzles for 24 hours. How does it take place actually? Has anyone here got that award? Please make some posts. I am unable to think that someone is solving puzzles for 24 hours in real life. How that is possible? What is the technique actually to get that award?